Hi Michael,
Yes, the 7.5 m2 Severne Glide would work very well on the Futura 111.
Maybe not for extremely overpowered conditions (> 16 knots perhaps) but
I've used the Glide on the Apollo, Serenity, and several 100 liter + Futuras,
Carves, etc.
The Glide will get you planing about the earliest possible with the Futura 111.
The Glide has a very powerful draft, and is very light in weight making it a great
sail for early planing.
It does not have much "top twist" so it's not so good if you sail it overpowered.
If you have a 6.5 m2 rig to take care of 16 knots and up, you will be very happy with the
Glide!